Water-insoluble monoazo-dyestuffs and process for preparing them



United States Patent Claims. cl. 26tl-193) The present invention relates to new water-insoluble monoazo-dyestuffs and to a process for preparing them; in particular it relates to dyestufis having the general formula COOR in which R represents a lower alkyl, cycloalkyl, aralkyl or aryl radical, and A represents the radical of a coupling component capable of coupling in a position adjacent to a hydroxyl group and being free from sulfonic acid and carboxylic acid groups.

I have found that valuable water-insoluble monoazodyestuffs are obtained by coupling a diazonium compound of an amine having the general formula -o0on mN-ooin which R represents a lower alkyl, cycloalkyl, aralkyl or aryl radical, with a coupling component capable of coupling in a position adjacent to a hydroxyl group and being free from sulfonic acid and carboxylic acid groups.

The diazo components used in the process of the pres ent invention can be repared, for example by saponifying the l-nitrobenzene-Z.S-dicarboxylic acid diester to form the l-nitrobenzene-2-carboxylic acid ester-S-carboxylicaci'cl, converting this compound into the l-nitrobenzene-Z-carboxylic acid ester-S-carboxylic acid chloride, reacting the product with ammonia to obtain the 1-nitrobenzene-2-carboxylic acid ester-S-carboxylic acid amide and subsequent reduction to form the l-aininobenzene-Z-carboxylic acid ester-fi-carboxylic acid amide.

As coupling components there may be used in the process of the present invention compounds capable of coupling in a position adjacent to a hydroxyl group, i.e. aromatic or heterocyclic hydroxyl compounds and compounds containing an enolizable orenolized keto-methylene group in an open carbon chain or in a heterocyclic ring. Such compounds are for example 2-hydroxynaphthalene, 2.3 -hydroxynaphthoic acid amide, 2.3-hydroxynaphthoic' acid alkyl amides or arylarnides of 2.3-hydroxynaphthoic acid and of acylacetic acids- The arylamide radical may contain one or more substituents which do not impart solubility in water, for example halogen atoms, alkyl, alkoxy, acyloxy, acylamino,

"ice

arylsulfonylamino, alkylsulfonylamino, trifiuoromethyl,

nitro, acyl, alkylsulfone, arylsulfone, cyano, carboxylic acid amide, carboxylic acid'ester, sulfonic acid amide, sulfonic acid esteror hydroxyl groups. Furthermore, there may be used as coupling components derivatives of S-pyrazolone, such as for example 1-aryl-3-methyl- 5-pyrazolones, 1-aryl-5-pyraZolone-3-carboxylic acid esters or 1-aryl-5-pyrazolone-3-carboxylic acid amides which may contain in the aryl radical one or more of the above-mentioned substituents which do not impart solubility in water, as Well as 2.4-dihydroxyquinoline or derivatives of barbituric acid.

The new dyestuffs can be prepared by known methods, for example by coupling the diazonium compounds with the coupling components in an aqueous medium, advantageously in the presence of a dispersing agent, such as a reaction product of ethylene oxidewith a fatty alcohol or an alkyl phenol, or in the presence of an alkyl sulfonate or an aryl sulfonate, or in the presence of an organic solvent. In order to obtain the 2120- dyestuffs in a favorable granular condition it is advan tageous, in some cases, to heat the reaction mixture after the coupling operation, for example for some time to boiling temperature. 7

The'dyestufis obtainable by the present invention are water-insoluble pigments which are distinguished by a good fastness to light and to solvents. They are suitable for the preparation of colored lacquers or lake formers, for the preparation of colored solutions or products of acetyl cellulose, nitro-cellulose, natural or artificial resins, such as polymerization or condensation resins, for example aminoplasts or phenoplasts, furthermore polystyrene, polyethylene, polypropylene, polyacryl compounds, polyvinyl compounds, such for example as polyvinyl chloride or polyvinyl acetate, polyester, rubber, casein or silicone resins.

Furthermore, they are suitable for pigment printing on a substratum, especially on textile fibers or on other flat structures, such as paper. The new dyestuffs may also be used for other purposes, for example in a state of fine subdivision for dyeing viscose rayon, cellulose ethers or cellulose esters, polyamides or polyurethanes in the spinning solution or for coloring paper.

The following examples serve to illustrate the invention, the parts being by Weight unless otherwise stated, and the relationship of parts by weight to parts by volume being the same as that of the kilogram to the liter.

Example 1 parts of 1 (2'.3 hydroxynaphthoylamino) 2 methylbenzene which was prepared by dissolving this compound in dilute sodium hydroxide solution and reprecipitating it with glacial acetic acid in the presence of a reaction product from about 20 mols of ethylene oxide and 1 mol of octadecyl alcohol. During the coupling the mixture is neutralized by the addition of a sodium acetate solution. When the coupling is complete, the dyestuif formed is filtered off, washed and dried. It is a red powder. The coupling may also be carried out in the presence of a substratum adapted for the preparation of color lakes.

ester-S-carboxylic acid amide, 20.8 parts of l-aminobenzene-2 carboxylic acid ethylester-5-carboxylic acid amide or 22.2 parts of l-amino-Z-carboxylic acid-n-propylester- S-carboxylic acid amide, yellow dyestuffs are likewise ob- Exam [e2 5 mined p The coupling may also be carried out 1n the presence Parts 0f1-amifl0beI1Z@ne-2-aIbXy11C acid y of a substratum adapted for the preparation of color ester-S-carboxylic acid amide are converted into the dil k azonium compound as described in Example 1. The diazo Example 3 solution is then run at room temperature into an aqueous 10 suspension of 29 parts of l-acetoacetylamino-2.5-dimeth- 19.4 parts of 1-ammobenzene-2-carboxylic acid methyloxy-4-chlorobenzene whichare prepared by dissolving this ester-S-carboxylic acid amlde are diazotrzed as described compound in dilute sodium hydroxide solution and reprein Example 1. The clarified diazo solution is combined cipitating it with glacial acetic acid in the presence of a With a filtered solution of 15 parts of 1-(2.3"-hydroxyreaction product from about 20 mols of ethylene oxide and 15 naphthoylamino)-4-methoxybenzene in 350 parts by vol- 1 mol of octadecyl alcohol. During the coupling the ume of pyridine. When the couplings complete, the dyesolution is neutralized by the addition of a sodium acetate stuff so obtained is filtered 0E, washed and dr1ed. It' is a solution. When the coupling is complete, the dyestufl red powder WhlCh dyes polyvinyl chloride red tints havsuspension is neutralized and boiled for one hour. The mg a g fasmess t0 bleedlngdyestuff so obtained is filtered oif, Washed and dried. It 20 In the following table further components are listed is a yellow powder. which can be used in the process of the present invention,

By using in the above-mentioned example instead of and also the tints of the printing inks prepared with the 19.4 parts of 1-am1nobenzene-2-carboxyllc acid methyl dyestuffs obtained from these components.

Diazo component Coupling component Tint p m b m ne-t -earboxylie acid methylester 5- 2.3-l1ydroxyuaphthoylaminobenzene Yellowish red.

carboxylic acid amide.

D 1-(2.3-hydr0xynaphtl1oylamino)-4-1nethylbenzene D0. 1-(2.3-hydroxynaphthoylaminc)-2-methoxybenzene D0. l-(2.3-hydroxyuaphthoylamino)-2-etl1oxybenzene Orange. 1-(2.3-l1ydr0xynaphthoylamino)-4-ethoxybenzene Yellowish red. 1-(2.3-hydroxynaphthoylamino)-2-methyl-fi-chlorobeuzene. Do. l-(2.3-hydr0xynaphthoylamino)Jamethoxy-5-chlorobenzcne Do.

1-(2 .3-hydr0xynaphthoylamino)-2.4dime thylbeuzeue D0 -3 yd y11aDhth0ylamino)-2.3-di1nethylbenzene Do, 1-(2.3-hydroxynaphthoy1an1ino)-2-n1ethyl-4-meth0xybenzene. Red.

-(2.3-hydroxynaphthoylaniino)-2.5-din1ethoxy-4-ehlorobenzene- Yellowlsh red. 1-(2. 3'-hydroxynaphthoylamino)-2. 4-dimeth0xy-5-ehlorobenzene Brovtnish red. 1-(2.3-hydroxynaphthoylan1in0)-naphthalene Red. 1-(2. 3-hydroxynaphthoylamino)-2. S-dimethoxybenzene Yellowish red. 2-(2. 3'-hydroxynaphthoylamino)-nanhthql ne Red, 2-(2. 3-hydroxynaphthoylamino)-3 methoxy-diphenylene oxide. 0. 1-(2.3-hydroxynaphthoylamino)-3-njtrobenzene Bluish red. 1-(2.3-hydroxynaphthoylamino)+methylsulfouylaminobenzeue. Red. 1-(2.3-hydr0xynaphthoylamiuo)-4-benze1iesulionylaminobenzene. Orange. 1-(2.3hydr0xynaphthoylamino)-4-hydroxybenzene; Yellowlsh red. 1-(2.3-hydroxyuaphthoylam no)-2-methyl-4 chlorobenzene Do. 1-(2.3-hydroxynaphthoylamino)2-methoxylienzene-aearboxylic acid amide Red. 1-(2.3-hydroxy-naphthoylamino)-4-n1ethylbenzene-B-sulfonic acid amide. Do. 1-(2.3'-hydr0xynaphthoylamino)-benzene-4-carboxylic acid amide Do. 2.3hydr0xynaphthoie acid amide Yell wish red. Q-hydroxynaphthalene. Orange. l-acetoacetylamino-fl-methoxyben YPHP Greenish yellow. l-aeetoaeetylaminoA-methoxyben7on0 Do. 1-acet0acetylamino-2-methylbenzone D0. l-aeetoacetylamino-2A-dimethylbenzene Do. l-acetoacetylamino-2-methyl-4-ehlorobenzene Do. l-acetoaeetylarnino-2-methyl-3-chlorobenzene Do. l-ncetoacetylarnino-2.4-di1nethoxybe Yellow l-acetoaeetylarnino-2.4-dimethoaybenzene Do. l-acetoaeetylamino-2-meth0xy-4-ch lorobenzene- Do. l-acetoaeetylamino-2-methyl-4methoxybenzene. Do

l-acetoacetylaminoi-acetylaminobenzene 1-aeeteacetylamino-2methyl-4-aeetyIaminobenzenel-acetoacetylarnino-Z-methoxyA-acetylarninobenzene. 1-acet0aeetylamino-2-ch loro-4-aeetylaminobenzeuc. 1-acetoaeetylamino-Ii-methyM-acetylamirlobenzenel-aceto acetylamino-3-chloro-4-aeetylaminoben zene 1-acet0acetylaminoEl-methoxy-4acetylaminobenzene l-aeetoacetylan1ino-3-acetylaminobenzone l-acetoacety1an1ino-3-acetylamino+rnethoxybenzene. l-aeetoaeetylamino-2-methyl-5-aeetylaminoben zene l'aeetoaeetylamino-2-methoxy-fi-acetylaminobenzene l-acctoacetylamiuo4-propionylaminobenzene. 1-acet0acetylamino-4-benzoylaminoben zene Greenis h yellow.

0. Yellow. Greenish yellow.

Do. Yellow. Greenish yellow. Yellow. Greenish yellow. Yellow. Greenish yellow; Yellow.

l-aeetoacetylarnino-4-benzenesulfonylaminobenzene- Do.

l-aeetoaeetylarnino-E.4-bis-acetylaminohenzene Do.

l-aeetoacetylamiuo-2.4-bis-acetylaminobenzene Do.

. l-aeetoaeetylaminc-4-hydroxybenzeue Reddish yellow.

- l-acetoacetylarniuo-2-methyl-4-methox'y-5-chlor Yellow.

l-aeetoacetylamin0-2-methyH-acetylamino-5-ch10r0ben D0. l-acetoaeetylamino-2-methoxy-4-aeetylamino-5-ehlorobenzene Do. l-acetoaeet ylamino-2-chloro-4-aeetylamino5-methoxybenzene-- Do. 1-acetoacetylamino-2-chloro+acetylamino-5-methylbenzenc Greenish yellow. l-aeetoacetylamino-nanhtlmlonp Do. 2-acetoacetylamino-napthrhqlenn I D l-phenylli-methyl-5pyrazol0ne Reddish yellow. 1-(4-acetylaminophenyl)-3-methyl-5-pyraz0lone Do. l-phenyl-5-pyrazolone-Elearboxylie acid amide... Do. l-(4-chlorophenyl)-3-metl1yl-5-pyrazolone Yellow. l-(4-suliamidopl1enyl)-3-methyl-5-pynmlm1n D0,

2.4 dihyroxyquinoline Greenish yellow. l-mninobenzene-Z-carboxylie acid ethyleste l-acetoacetylamino-Z-methoxy-4-acetylamiuo-fi-chlorobenzene Yel w.

carbon lie acid amide.

Do l-aeetoacetylaminoiacetylalninobenzene Do.

IL l

ROOC

in which R represents a member selected from the group consisting of methyl, ethyl and propyl, R represents a member selected from the group consisting of hydrogen, phenyl, methylphenyl, methoxyphenyl, ethoxyphenyl, nitrophenyl, methylsulfonylaminophenyl, benzenesulfonylaminophenyl, hydroxyphenyl, methylchorophenyl, methoxychlorophenyl, dimethylphenyl, methylmethoxyphenyl, dimethoxyphenyl, dimethoxychlorophenyl, naphthyl, carbamylphenyl, methoxycarbamylphenyl, methylsulfamylphenyl and methoxydiphenylene oxide, and R represents a member selected from the group consisting of methylphenyl, methoxyphenyl, hydroxyphenyl, acetylaminophenyl, propionylaminophenyl, benzoylaminophenyl, benzenesulfonylaminophenyl, dimethylphenyl, methylchlorophenyl, dimethoxyphenyl, methoxychlorophenyl, methylmethoxyphenyl, methylacetylaminophenyl, methoxyacetylaminophenyl, acetylaminochlorophenyl, bisacetylaminophenyl, methylmethoxychlorophenyl, dimethoxychlorophenyl, methylacetylaminochlorophenyl, methoxyacetylarninochlorophenyl and naphthyl.

2. The water-insoluble monoazo-dyestuff of the formula CO-NH2 OCH 1i 3 3. The water-insoluble monoazo-dyestuff of the formula H COOC 4. The water-insoluble monoazo-dyestuif of the formula HsCOOO- I N 1% ?CH3 l OCH 5. The water-insoluble monoazo-dyestutf of the formula CO-NH:

HaCOOO- References Cited in the file of this patent UNITED STATES PATENTS 1,914,427 Heyna June 20, 1933 2,019,914 Kracker Nov. 5, 1935 FOREIGN PATENTS 921,592 Germany Dec. 23, 1954 536,606 Italy Dec. 7, 1955 

1. A WATER-INSOLUBLE MONAZO-DYESTUFF WHO FORMULA IS SELECTED FROM THE GROUP CONSISTING OF 